/*导航栏*/
*{
margin:0px;
padding:0px;
}

#head{
width:100%;

font-size:15px;
}
.f1{
float:left;

}
.fr{
float:right;
}
a{
text-decoration:none;
color:white;
}
ul{
list-style:none;
}

.header_top{
width:100%;
height:30px;
background:#46086b;
border-bottom:1px solid #00BFFF;

}
.header_top .header_nav{
width:1210px;
height:30px;
background:#46086b;

margin:0 auto;
}
.header_top .header_nav .f1 li{
float:right;
color:orange;
line-height:30px;
margin-right:20px;

}
.header_top .header_nav .fr li{
float:left;
color:orange;
line-height:30px;
margin-left:20px;
}

/*图片和选择框*/
.bac{
margin-top:0px;
width:100%;
height:800px;
background:url(../imger/背景.jpg);
background-size:cover;
position:absolute;
}
/*选择框*/
.box{
background:#8B4726;
width:980px;
height:50px;
margin:100px auto;
border-radius:30px;
overflow:hidden;
box-shadow:0 0 0 3px white;
}
.nav,.tnav{
list-style-type:none;
padding:0px;
text-align:center;
}
.nav li{
float:left;
}
.nav li a{
display:inline-block;
height:50px;
line-height:50px;
color:#fff;
background:url();
text-decoration:none;
padding:0px 20px;
width:100px;

}
.nav li a:hover{
background:#00BFFF;
color:#000;
}
.tnav{
display:none;
/*background:#000;*/
background:#AEEEEE;
position:absolute;
top:150px;
}
.tnav li{
float:none;
}
.nav li:hover .tnav{
display:block;
}
.nav{
margin:0px;
}